Alert archive / Nebraska / Severe Thunderstorm Watches in 2003

Severe Thunderstorm Watch 555

June 21, 200338 counties in Nebraska; 29 counties in South Dakota; 4 counties in Wyoming

The Storm Prediction Center issued this severe thunderstorm watch at Jun 21, 2003, 2:10 PM CDT for 38 counties in Nebraska; 29 counties in South Dakota; 4 counties in Wyoming. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued: Jun 21, 2003, 2:10 PM CDT (19:10 UTC)
Expired: Jun 21, 2003, 9:00 PM CDT
In force: 7 hr
Issued by: the Storm Prediction Center

All 71 counties

Antelope County, NE, Arthur County, NE, Banner County, NE, Blaine County, NE, Boone County, NE, Box Butte County, NE, Boyd County, NE, Brown County, NE, Cherry County, NE, Cheyenne County, NE, Custer County, NE, Dawes County, NE, Deuel County, NE, Garden County, NE, Garfield County, NE, Grant County, NE, Greeley County, NE, Holt County, NE, Hooker County, NE, Howard County, NE, Keith County, NE, Keya Paha County, NE, Kimball County, NE, Lincoln County, NE, Logan County, NE, Loup County, NE, McPherson County, NE, Merrick County, NE, Morrill County, NE, Nance County, NE, Rock County, NE, Scotts Bluff County, NE, Sheridan County, NE, Sherman County, NE, Sioux County, NE, Thomas County, NE, Valley County, NE, Wheeler County, NE, Aurora County, SD, Bennett County, SD, Brule County, SD, Buffalo County, SD, Butte County, SD, Charles Mix County, SD, Custer County, SD, Douglas County, SD, Fall River County, SD, Gregory County, SD, Haakon County, SD, Hand County, SD, Hughes County, SD, Hyde County, SD, Jackson County, SD, Jerauld County, SD, Jones County, SD, Lawrence County, SD, Lyman County, SD, Meade County, SD, Mellette County, SD, Oglala Lakota County, SD, Pennington County, SD, Potter County, SD, Stanley County, SD, Sully County, SD, Todd County, SD, Tripp County, SD, Ziebach County, SD, Crook County, WY, Goshen County, WY, Niobrara County, WY, Weston County, WY

The radar

The North Platte radar (KLNX), 168 km from the middle of the area, began a volume at 19:11 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

Warnings issued inside it

20 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
Jun 21, 2:49 PM CDT	Severe Thunderstorm Warning	UNR	Meade	56 min
Jun 21, 3:21 PM CDT	Severe Thunderstorm Warning	UNR	Butte	39 min
Jun 21, 3:34 PM CDT	Severe Thunderstorm Warning	UNR	Meade, Perkins	56 min
Jun 21, 3:50 PM CDT	Tornado Warning	UNR	Crook	55 min
Jun 21, 4:22 PM CDT	Severe Thunderstorm Warning	UNR	Ziebach	53 min
Jun 21, 4:26 PM CDT	Severe Thunderstorm Warning	UNR	Meade	64 min
Jun 21, 4:40 PM CDT	Severe Thunderstorm Warning	UNR	Crook	65 min
Jun 21, 5:08 PM CDT	Severe Thunderstorm Warning	UNR	Ziebach	67 min
Jun 21, 5:14 PM CDT	Severe Thunderstorm Warning	UNR	Butte, Lawrence	61 min
Jun 21, 5:50 PM CDT	Severe Thunderstorm Warning	LBF	Cherry, Grant, Sheridan	55 min
Jun 21, 6:05 PM CDT	Severe Thunderstorm Warning	UNR	Butte, Meade	55 min
Jun 21, 6:44 PM CDT	Severe Thunderstorm Warning	LBF	Cherry, Sheridan	61 min
Jun 21, 7:05 PM CDT	Severe Thunderstorm Warning	LBF	Grant	40 min
Jun 21, 7:14 PM CDT	Severe Thunderstorm Warning	UNR	Pennington	46 min
Jun 21, 7:32 PM CDT	Severe Thunderstorm Warning	LBF	Brown, Cherry, Keya Paha	58 min
Jun 21, 7:45 PM CDT	Severe Thunderstorm Warning	LBF	Cherry, Sheridan	60 min
Jun 21, 7:50 PM CDT	Severe Thunderstorm Warning	UNR	Mellette	55 min
Jun 21, 8:13 PM CDT	Severe Thunderstorm Warning	ABR	Jones, McPherson	47 min
Jun 21, 8:29 PM CDT	Severe Thunderstorm Warning	ABR	Hughes, Hyde	46 min
Jun 21, 8:34 PM CDT	Severe Thunderstorm Warning	LBF	Cherry, Keya Paha	56 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Rapid City, SD (KUNR), launched 12:00Z, 7.2 hours before the alert went out and 171 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 34 J/kg
Mixed-layer CIN: -373 J/kg
Mixed-layer LCL: 2468 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: -11 m²/s²
0-3 km storm-relative helicity: -39 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 20, 7:19 PM CDT	Mesoscale Discussion	SPC	Chase, Dundy, Frontier, Hayes, Hitchcock, Perkins and 1 more	86 min
Jun 20, 8:59 PM CDT	Mesoscale Discussion	SPC	Arthur, Blaine, Brown, Chase, Cherry, Custer and 18 more	61 min
Jun 21, 4:52 PM CDT	Mesoscale Discussion	SPC	Antelope, Arthur, Blaine, Boone, Box Butte, Boyd and 30 more	83 min
Jun 21, 1:14 PM CDT	Mesoscale Discussion	SPC	Butte, Campbell, Corson, Custer, Dewey, Fall River and 14 more	3 hr
Jun 21, 2:45 PM CDT	Severe Thunderstorm Watch	SPC	Brown, Campbell, Corson, Day, Dewey, Edmunds and 7 more	6 hr
Jun 21, 3:03 PM CDT	Mesoscale Discussion	SPC	Brookings, Lincoln, Minnehaha, Moody	117 min
Jun 21, 6:50 PM CDT	Severe Thunderstorm Watch	SPC	Brown, Day, Edmunds, Grant, McPherson, Marshall and 1 more	7 hr

Nearby

Severe Thunderstorm Watches in Nebraska, 2003 Severe Thunderstorm Watches in South Dakota, 2003 Severe Thunderstorm Watches in Wyoming, 2003 Every severe thunderstorm watch in 2003

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.